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Sen. Susan Collins, R-Maine, said she’s urged the homeland security secretary to increase the country’s threat level while the material seized from bin Laden’s compound is reviewed.

“I continue to question the secretary’s decision not to increase the threat level,” said Collins, the top Republican on the Senate Homeland Security and Governmental Affairs Committee.

Counterterrorism officials have been meeting regularly since bin Laden was killed to evaluate the threat to the U.S.

Associated Press writers Adam Goldman and Matt Apuzzo contributed to this report.